<template>
    <div id="Login" class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avator_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登陆表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-yonghu"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont  icon-mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
    </div>
    </div>
</template>
<script>
export default {
  name: 'Login',
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登陆表单
    resetLoginForm () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登录成功')
        // 1.将登录成功之后的 token 保存到客户端的 sessionStorage 中
        //  1.1 项目中除了登录之外的其他 API 接口 必须在登录之后访问
        //  1.2 token 只应在当前网站打开期间生效 所以将 token 保存在 sessionStorage
        console.log(res)
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页  路由地址是 /home
        this.$router.push('./home')
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.login_container {
    background-color: #2b4b6b;
    height: 100%;
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
      .avator_box{
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
          img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
          }
        }
      .login_form{
          position: absolute;
          bottom: 0;
          width: 100%;
          padding: 0 20px;
          box-sizing: border-box;
      }
      .btns{
          display: flex;
          justify-content:flex-end ;
      }
    }

}
</style>
